Toshiba e-STUDIO556 Service Manual page 140

Multifunctional digital systems

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3.16 Fuser Unit

The toner is fused on the paper separated from the photoconductive drum by having heat and pressure

applied to it. The paper is then discharged through the paper exit section. The fuser unit consists of the

IH coil (IH-COIL), fuser roller, pressure roller, separation fingers, cleaning web, thermistors (THM1, 2, 3

and 4), thermostat (THMO1 and 2), fuser exit rollers, fuser transport sensor (S9), etc.

Jam release knob

At the fuser unit, the toner is fused on the paper which has been separated and transported from the

photoconductive drum by having heat and pressure applied to it. The pressure and fuser rollers are

rotated by the driving of the fuser motor (M3). The fuser roller has an IH coil (IH-COIL) inside, which

does not rotate itself. The fuser and pressure rollers are always pressured by a spring force. After being

fused, the paper is separated smoothly from the fuser roller by the separation fingers.

The thermistors (THM1, 2 and 3) detect the fuser roller temperature to control it, and when the

temperature becomes abnormally high, which is detected by thermostats (THMO1 and 2), the power

supply to the IH coil (IH-COIL) is cut off.

e-STUDIO556/656/756/856/557/657/757/857

OUTLINE OF THE MACHINE

Web pushing roller

Fuser transport

Cleaning web

Web detection

Fuser roller

Fuser roller

Fuser roller

Fuser entrance

Pressure roller

Pressure roller